Due to the large size, special coating material, complicated process, and varied production modes of aviation products, it is necessary to conduct in-depth research on the automatic spraying process of aviation products in order to truly exert the effectiveness of the painting robot. First of all, the principle of air spraying and automatic spraying process equipment is described. Then, the core content and key process parameters of automatic spraying process research are outlined. Finally, based our own practical experiences, a five step research method, including basic process experiments, sample spraying experiments, real work-piece praying experiments, spraying process standardization and continuous optimization was put forward, and the key elements and experimental methods of each step are given.